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2. The birds in the cage which I bought yesterday 不是

1. Birds can fly 是

3. 不要把從句的謂語(yǔ)當(dāng)成句子的謂語(yǔ), 或把主句的謂語(yǔ)當(dāng)成從句的謂語(yǔ)。

　如果是一個(gè)復(fù)合句，主句和從句都應(yīng)該分別有自己的主語(yǔ)和謂語(yǔ)。

　典型錯(cuò)誤：

1) 1)　 Those who eat too much will easily ill.

∟Those who eat too much will easily get ill.

　2) When he walking in the park, he felt a little tired.

　 ∟When he was walking in the park, he felt a little tired.

　3)When I at school, I studied very hard.

　 ∟When I was at school, I studied very hard.

II. Practice: 判斷以下是否是句子。

2. 一個(gè)句子不能同時(shí)有兩個(gè)謂語(yǔ)。

　典型錯(cuò)誤：

1) The old man likes take a walk in the village after supper.

　 ∟The old man likes to take a walk in the village after supper.

　2) I enjoy talk with him over a cup of coffee.

　∟I enjoy talking with him over a cup of coffee.

　3) The boy ran to his mother cry.

　∟The boy ran to his mother crying.

　4) After write the notice, he put it up on the wall.

　∟ After writing the notice, he put it up on the wall.

　 After he wrote the notice, he put it up on the wall.

對(duì)英語(yǔ)句子的認(rèn)識(shí)

意義：英語(yǔ)的句式與中文的不同。我們?cè)趯W(xué)習(xí)英語(yǔ)的時(shí)候要注意到這一點(diǎn)。有的同學(xué)在學(xué)習(xí)中對(duì)此沒(méi)有足夠的認(rèn)識(shí)，常常受中文的干擾。在寫作中表現(xiàn)出不能寫出正確的句子。

I. 什么是句子？

　長(zhǎng)的是句子，短的是詞。×

　√ 無(wú)論字?jǐn)?shù)多少，只要有主語(yǔ)和謂語(yǔ)(動(dòng)詞)，而且能表達(dá)完整的意義的一句話就是一個(gè)句子。

I am tired.

Pressing one’s palm together and resting one’s head on the back of one’s hand while closing the eyes as if sleeping means “I am tired.”(雙手合攏，閉上眼，把頭靠在手背上像睡覺(jué)的樣子，意思是說(shuō)“我累了�！�)

　這兩個(gè)句子都具備了主語(yǔ)和謂語(yǔ)。都是完整的句子。要記�。涸谟⒄Z(yǔ)中，一個(gè)句子必須且只能有一個(gè)謂語(yǔ)。

1. 省略主語(yǔ)的句子

Come in, please. (You)

Open the door.

Sit down.

Stand up.

What a day! (What a terrible day it is!)

22、OH^-　 Cl^-　 K⁺；　 鐵粉；　 Ag(或銀)；

Ag⁺　 Fe³⁺　 Cl^-　 OH^-；　 KNO₃

21、(1)Fe²⁺、Fe³⁺、Cu²⁺、MnO₄^- (2)NH₄⁺、Mg²⁺、Al³⁺ (3)S^2-、CO₃^2-、HCO₃^-(4)Ba²⁺、 SO₄^2-

(5)Cl^-、NO₃^-、Na⁺

20、①　 H₂O₂ + 2I^- + 2H⁺ = I₂ + 2H₂O　 ② +2價(jià)

19、(1)含有Ba²⁺、Ca²⁺離子中的一種或兩種，因?yàn)锽aSO₄不溶于水，CaSO₄微溶于水。　　　 (2)Fe(OH)₃　 　　　　

(3)2AlO₂^-+CO₂+3H₂O=2Al(OH)₃↓+CO₃^2-

或AlO₂^-+CO₂+2H₂O=Al(OH)₃↓+HCO₃^-

13、A　 14、B　 15、C　 16、C　 17、A　 18、A